Light generation with light emitting diode and laser

Abstract

A light generating device, comprising: at least one light emitting diode having a semiconductor layer that emits a first primary light, and having a phosphor layer arranged on the semiconductor layer, and at least one laser for generating at least one laser beam composed of a second primary light, by means of which the phosphor layer is irradiatable, wherein the phosphor layer is configured for at least partly converting the first primary light into at least one first secondary light and for at least partly converting the second primary light into at least one second secondary light. The light generating device is configured to dynamically illuminate the phosphor layer by means of the second primary light.

The invention claimed is: 
     
       1. A light generating device, comprising:
 at least one light emitting diode having:
 a semiconductor layer that emits a first primary light, 
 a phosphor layer applied directly to a first surface of the semiconductor layer, and 
 a reflector layer applied to a second surface of the semiconductor layer opposite to the first surface of the semiconductor layer, wherein the semiconductor layer, the phosphor layer, and the reflector layer collectively form a thin-film light emitting diode; and 
 
 at least one laser for generating at least one laser beam composed of a second primary light, such that the phosphor layer is irradiatable, 
 wherein the phosphor layer is configured for at least partly converting the first primary light into at least one first secondary light and for at least partly converting the second primary light into at least one second secondary light, 
 wherein the light generating device is configured to dynamically illuminate the phosphor layer by means of the second primary light. 
 
     
     
       2. The light generating device as claimed in  claim 1 , wherein at least one mirror scanner is arranged between the at least one laser and the phosphor layer irradiatable thereby. 
     
     
       3. The light generating device as claimed in  claim 1 , wherein at least one surface light modulator is arranged between the at least one laser and the phosphor layer irradiatable thereby. 
     
     
       4. The light generating device as claimed in  claim 1 , wherein a power of at least one laser beam is variable. 
     
     
       5. The light generating device as claimed in  claim 1 , wherein a plurality of light emitting diodes are jointly dynamically illuminatable by means of at least one laser beam. 
     
     
       6. The light generating device as claimed in  claim 1 , wherein the light generating device comprises a plurality of individually drivable light emitting diodes. 
     
     
       7. The light generating device as claimed in  claim 1 , wherein the first secondary light and the second secondary light have a different wavelength. 
     
     
       8. The light generating device as claimed in  claim 1 , wherein the phosphor layer of at least one light emitting diode is irradiatable simultaneously by the first primary light and the second primary light or is irradiatable only by the first primary light or the second primary light. 
     
     
       9. The light generating device as claimed in  claim 1 , wherein the laser beam is configurable such that an extent of a luminous spot generated on the phosphor layer by a laser beam measures not more than 50% of a corresponding extent of the phosphor layer. 
     
     
       10. A headlight, comprising at least one light generating device as claimed in  claim 1 . 
     
     
       11. The light generating device of  claim 1 , wherein the at least one light emitting diode and the at least one laser are arranged together on a circuit board. 
     
     
       12. The light generating device of  claim 1 , wherein the at least one light emitting diode includes a plurality of individually drivable luminous segments.